{
  "manageEntity": {
    "action": "Save",
    "entityId": "685664698",
    "entityType": "Track",
    "nonce": "0x605eeb534a185ff27d408ab87726bd5648bb1e83fc1853ee2cff15922902615d",
    "signature": "0xf8456a3b72eaf404c7c499e251a093723822c4225a88cc3f4b42cdb95e9a383d2f861edc2d23cc8558c0532a65b102eb5847dff68d10c870608178497d12bec61b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}